556
Wagner and Dupont
(a)
orwegian-Greenland Sea
80
nonhcrn
southern
•
" ~ l 254000jIm
o IfKIIOnf)3. I 25Jltn
70
o "iXtIDn20-63 .. m
o rlktlOn',3-20~m
o fladlOn 2'-6,3 p'"
'"
. ~ 60
o t .. l cUon.a JIom
<=
"E
OJ) 50
c:
'" '"
OJJ
g 40
~
8.
u 30
0
E'"" 0
c: 20
.e
- '"
:J ~
:eo !::::I",:j
.~ ~O
Q 0
hi rht ~ TIl rtr ~ ~ IL ~
17728·1 . 17728·1. 17728·1. 21906· 21906-1. 23352·2.23352· 2.23071 . 2. 23071 · 3.
0-1
15· 16 20·21
1.5·6
25·26
0·1
18·19
2·3
R9·90
(b)
'- sit~,-D;;pi-h--T51~~tig;~hi~ ----Toc----r-- Toc--- ,-- Toc---r- S ubmi crosc~pi~ -r- s~;-b;;i-~~~~;;opi-~--'
i level
measured I calculated I proportion i or2anic carbon
organic carbon
from bulk I from sub· I in fraction i 2 ~m Vitrini! = 1 ~m Vitrini! ~
sediment i fractions ' < 2 ~m '
< 0.99 J.II11
< 0.49 fliT)
,
I
mineral phase
mineral phase
. ___ (~.Q. !g. §.D.. __ ..... J._ . . . _. _ . . _. _ . . _ . . _ . . _ .
..1 ... _ . .
__ ~:J.~~! . .. . . _ . . . . J . . . _. _ . . ~: . !. ~~_ . . __ . . _ ._ . . . _ . . \~.~~~.__
wt %
w.~~1t
Fig. 3. Estimation of submicroscopic OM (particulate OM <2~m/< 1 flm) in modern and past glacial deep sea sam·
pies from the southern and northern Norwegian·Greenland Sea (modified after Wagner 1993). (a) Distribution of
TOe percentages in different grain size fractions. (b) Presentation of TOe contents measured on bulk sediment
samples compared to calculated Toe contents from TOe in subfractions, weight balanced percentages of bulk
TOe in the size fraction <2 flm (settling velocity fractionation using density of quartz), and estimation of sub micro·
scopic organic carbon for vitrinite particles (density 1.4 g cm 3 ) of2flm and I ~m particle size.